The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 16, 2013
Filed:
May. 25, 2005
Chih-lung Lin, Redmond, WA (US);
Minghui Xia, Bellevue, WA (US);
Pohsiang Hsu, Redmond, WA (US);
Shou-jen Wu, Redmond, WA (US);
Chih-Lung Lin, Redmond, WA (US);
Minghui Xia, Bellevue, WA (US);
Pohsiang Hsu, Redmond, WA (US);
Shou-Jen Wu, Redmond, WA (US);
Microsoft Corporation, Redmond, WA (US);
Abstract
A video encoder includes a region detector module that classifies blocks of video frames. An adaptive filter module applies a median filter to a block based upon a block classification assigned by the region detector module. An adaptive quantization module quantizes a block according to a quantization method adaptively determined based upon a block classification assigned by the region detection module. In one example, a video encoder adaptively determines a median filter selected using a block classification. In another example, a video encoder adaptively determines whether to drop an isolated last transform coefficient based on the block classification, and/or applies a dead-zone selected using the block classification.